风燥伤肺和肺阴亏耗证痰的共同点是（）。
A.痰多稠黄
B.痰少而黏或带血丝
C.痰少而稀白
D.痰多而黏成块
E.痰黏而黄
参考答案：B
—I am really struck by your spoken English. You speak so fluently. Have you been abroad.
—Yes, I ________ in London for two years．
A．have stayed
B．stayed
C．had stayed
D．have been staying
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